PUSH-BUTTON START, Diagnostic DTC:B2275

DTC Code DTC Name
B2275 STSW Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction is detected in the starter circuit inside the certification ECU (smart key ECU assembly).

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2275 STSW Monitor Malfunction Certification ECU (Smart Key ECU Assembly) internal HV activation request output circuit malfunction or external circuit malfunction (1-trip detection logic*)

  • ECU-B NO. 5 fuse

  • Certification ECU (Smart Key ECU Assembly)

  • Wire harness or connector

DTC Output Confirmation Operation:


  • Turn the power switch on (IG) and wait 10 seconds or more, then start the hybrid control system 3 times.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected

  • The power source mode changes to on (READY) even though the hybrid control system is not started.

  • The power source mode does not change to on (READY) even though the hybrid control system is started.

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WIRING DIAGRAM

A01KSPME06

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The push-button start uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

  • Inspect the fuses of circuits related to this system before performing the following procedure.

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

  • Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

Tech Tips

Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
B2275

    Power Source Control

  • Starter Request Signal

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A01KSZDC62
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      E33-2 (+B) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. A01KSZDC63
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E33-11 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the E135 hybrid vehicle control ECU assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specification Condition
      E33-7 (ST2) - E135-9 (ST2) Always Below 1 Ω
      E33-7 (ST2) or E135-9 (ST2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Reconnect the E33 certification ECU (smart key ECU assembly) connector.

    2. Reconnect the E135 hybrid vehicle control ECU assembly connector.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specification Condition
      E33-7 (ST2) - Body ground With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released 9 V or higher → 1 V or less
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    B

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    C

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)